Call this member function repeatedly to redraw a drag rectangle. Call it in a loop as you sample mouse position, in order to give visual feedback.
void DrawDragRect( LPCRECT lpRect, SIZE size, LPCRECT lpRectLast, SIZE sizeLast, CBrush* pBrush = NULL, CBrush* pBrushLast = NULL );
| Header File | Afxwin.h | 
| Platforms | |
| Versions | 1.0 and later | 
| Complete documentation | Visual C++ documentation | 
CDC Overview, CDC Member Functions, Graphical Drawing Classes, CRect, CDC::GetHalftoneBrush